All large panel systems rely on their own dead weight and the friction this produced to hold everything together “house of cards fashion”

Assembly: cranes lifted panels into place where they were located onto bolts.

Collapse: In May 1968 disaster struck when a tenant on the 18th floor of a 22-storey TWA block at Ronan Point lit her stove, igniting a gas leak. The resulting explosion of 3-12psi (per square inch) pressure in her flat was not large, but it removed load-bearing wall panels and the south-east corner of the building slid to the ground. Pictured below is the Ronan Point Estate after the explosion in the tower on the left.